Pneumatic atomizer.



EDUARDO ZAWELS & ESTANISLAD ZAWELS. PNEUMATIC ATOMIZER.

APPDICATION FILED APR. 20. 1916-,

Patented Nov. 13, 1917.

UNITED STATES PATENT OFFICE.

EDUARDO ZAWELS AND ESTANISLAO ZAWELS, OF BUENOS AIRES, ARGENTINA.

f PNEUMATIC ATOMIZER.

Application filed April 2o, 1916.

To all whom t may concern.'

Be it known that we EDUARDO ZAwnLs and Es'ranisnao ZAwnLs, citizens of the Argentine Republic, dentists, residing at Calle Maip 671, Buenos Aires, Argentine Republic, have invented a new and useful Pneumatic Atomizer, of which the following is a specification.

This invention relates to an atomizing apparatus, specially devised for clinical purposes, but which in general may also be adopted as a substitute for common atomizers over which it offers, among others, the advantage that compressed air may be stored therein, in sufficient amount for expelling all the liquid contents, which may be medicaments, perfumes or'other substances.

The common hand operated apparatus used for projecting atomized liquids at a certain distance, are inconvenient in use as in order to cause the same to operate, air must be pumped in or compressed all the time while thevliquid is being discharged, and owing to this fact, besides their limited range of projection and the constant trouble caused by their handling, said apparatus is not suitable for being eliiciently employed for clinical purposes.

As will be seen later on, an essential feature of the atomizing apparatus which I have devised, is the provision of novel means by which not only may the passage or duct which communicates with the discharge spout, be obturated at will, but also the pressure and the amount of the discharged liquid may be regulated.

The apparatus may be used when performing injections, as means for constantly impelling the air, to cause` the evacuationof the serum or other medicament contained in common serum bulbs or other containers. The body part of the pump is kept out of contact with the liquid by means of a shell or casing of glass or other suitable material which, the same as the reservoir, may be perfectly sterilized; the arrangement allows of the serum or other medicament being introduced and ejected directly from the apparatus at the required degree of pressure and to the necessary amount, which may be ascertained by means of a transparent indicator or gage which permits of inspecting the interior of the reservoir.

Said apparatus consists of a receptacle of convenient shape, size and material, provided with a scale or graduatedV index,

Specification of Letters Patent.

Patented Nov. 13, 1917.

Sera1No. 92,371.

wherein is mounted a forcing pump of which only protrudes the knob'or button for operating the plunger whose body is surrounded by a shell or casing of glass. The apparatus is further provided with an inlet opening for charging the liquid, closed by a screw cap or plug which may be fitted or not with a pressure gage for regulating the pressure, as well as with an atomizing nozzle, conveniently connected Vto the Siphon tube arranged with a suitable obturating i Vallowing of the same to be operated by the same hand which holds the apparatus.

Fig. l is a central section of the same device.

In said drawings, l indicates the body part of the receptacle, which is provided with the scale or graduated indeX 32. The charging orifice 2 of the receptacle extends into the interior, in order to determine the highest level to be reached by the liquid, said orifice being closed by` means of a screw plug 3 which, if so desired, may be fitted with a pressure gage, as indicated in' dotted lines in Fig. 2. The body or casing of the pump 4 is screwed into the upper part of the receptacle, and has a circular enlargement 5, by means of which it may be adjusted. Onto the upper end of the body partof the pump, and so as to cover the whole, Yis screwed the bell or dome 6 which at the same time serves as guide for the ,stroke of the plungerirod 7 which operates the plunger 8. The lower end of the body of the pump Vgradually decreases in diameter j and ends with a face provided with a boring 9, obturated by the valve 10 normally kept in its closed position by the spring 11. Said valve operates in the casing formed by the internal shell l2 which in its turn is covered by the outer shell 13, both being screwed onto the body part of the pump and being provided with one or more orifices 33, registering with each other for the purpose of from the holes 33, is compelled to circulate between the pump and the casing and is eX- hausted through the holes 35, the metallic parts of the pump being thus kept perfectly Vout of contact with the liquid, and are therefore not liable to get damaged. On the other hand, the casing or shell 34 may easily be taken out and sterilized, so as not to alter the condition of the serum or other medicaments which may get into contact with the same, while at the same time it would be diicult to realize the same thing with the body part of the pump.

The tubes 14 and 15 are Obturated simultaneously by the cock 16, said tubes being inserted into the receptacle 1 until they nearly reach the bottom. The outer end oit the tube 15 ends with a detachable nozzle 17, within which is placed concentrically the end of the inner tube 1e, which serves as diaphragm and for supporting the atomizing head 36. i

The operation of the apparatus is as fob lows:

After charging the receptacle with liquid to the level automatically determined by the extension of the tube 2, the plunger rod 0I" the pump is operated until the required pressure is arrived at whiCh, as has been stated before, may be ascertained by means of a small pressure gage 37, arranged at the .cover or lid 3 or at any other suitable point or' the apparatus.

After obtaining the desired degree of pressure, the cock 16 is opened, the liquid is forced through the tubes 1st and 15 and caused to pass through the oriiices of lthe detachable nozzle 17, being projected in a perfectly atomized condition by the head 36.

rEhe Ivalve device shown by Figs-3 and et, is conveniently used in substitution of the cock 16, being formed of the tube 18 conneet-ed to the tube which extends into the interior of the apparatus. Within the upper end of said tube 18 moves the rod 19, normally kept in its elevated. position by `means ot the spring 20, mounted between the circular shoulder or enlargement 21 and the packing of rubber or other material 22,

npump casing which rests on the wall 23. The rod 19 passes through said wall as well as through the valve diaphragm 2st which is closed thereby by means of the valve 25, retained .in the lower end of the said rod; the bifurcated rod 26, provided with the pin 27, exerts pressure on the rod 19, through the lever 28, and opens the aperture of the valve in order to allow of the liquid flowing from the tube 18 to the curved tube 29, onto the end or' which is screwed the nozzle 30, inside or which is mounted the diaphragm 31 which carries the atomizer 36.

By means of this arrangement, with the index finger or' the hand which supports the apparatus, pressure is applied to the lever 28, in order to open the aperture of the valve '25, which latter will be closed, on the pressure being released, `by the action of the spring 20.

`lt will be 'evident that by means of' the cock 16 or the lever 28, the discharge ci' the liquid may be stopped and started again as many times as desired, until the contents are used up and without it being necessary to constantly operate the air pump, as must be done in connection with common atomizers.

l declare that what l claim as new and desire to secure by Letters Patent is:

A pneumatic atomizer, comprising a closed receptacle tor the liquid to be atomized, a valved pump casing disposed in the said receptacle and extending substantially fromtop to bottom, the said Casing being in communication with' the exterior, a compressor piston working in the said casing, a discharge tube extending `from the interior of the receptacle at the bottom part thereof to the exterior, anatomizer nozzle provided on the exterior part of ythe discharge tube, means for controlling the discharge tube, and a protective shell disposed within the said receptacle and inclosing the pump casing, the said shell being spaced from the casing and having an opening communicating with the upper part of the receptacle, the being provided with a port communieatingy with the space between the said casing and shell'.

Y EDUARDO ZAVELS.

ESTANSLAO ZAVVELS.

Witnesses:

A. L. BELLO, N. RUCKR.

Copiesl'of this patent may be obtained for ve cents each, by addressing the Commissonerof Iatents,

' Washington, D. C 

